Resonant characteristics of multimode interferometer coupled square ring semiconductor resonators

Abstract

This work reports the spectral characteristics of coupled square ring semiconductor resonators. For a single mode operation, the square ring cavities coupled with multimode interferometers (MMIs) are proposed and fabricated using the epitaxial layers of 1.55 microm center wavelength InGaAsP-InP multiple quantum wells. Resonant characteristics can be tailored by varying the parameters of the cavity size or the waveguide width. By using the MMI coupled square ring cavity, a stable single spectral lasing mode was obtained in various combinations of square cavities.

Bow-tie Mode Lasing in a Grooved Rectangular Semiconductor Microcavity

“…The experimental setup for bow-tie mode lasing was similar to that used previously [15,16]. InGaAsP/InGaAs multiple quantum wells (8 MQWs, λ g~1 .3 μm) were surrounded by two confinement layers in the epistructure.…”

Optical Characteristics of Unidirectional Single-mode Lasing Square Ring Cavities

“…또한 제작되는 매질에 따라 다르기는 하지만 링 공진기의 직경이 수 μm 정도로 작 게 제작하더라도 매우 작은 free spectrum range(FSR)의 특성 을 나타낸다. 이러한 작은 FSR을 증가시키기 위해서, 기존 연구에서 multi-mode interferometer(MMI)가 적용된 이중 사 각 링 공진기를 보고하였다 [11] . 이 소자는 InP를 기반으로 성 장된 InGaAsP/InGaAs 다중 양자 우물구조의 에피택셜 구조 를 가진 반도체 기판을 사용하여 제작하였다.…”

“…기존 연구에서 단일모드 구동을 위한 MMI가 적용된 이중 사각 링 공진기의 기본 구조 [11] 를 소개하였으며, 그림 1에 나 타내었다. 방향 선택을 위한 어떠한 방법도 적용되지 않은 이러한 구조는 일반적으로 양 방향 발진을 하게 된다.…”

Single Mode Lasing in InGaAsP/InP Semiconductor Coupled Square Ring Cavities

“…We are going to briefly describe the design, fabrication and measurement processes of the square ring cavity. Details of the entire processes have been described elsewhere [23].…”

“…This difficulty limits the fabrication and application of semiconductor ring or disk cavities as the integrated device elements. In our previous work [23], single mode lasing was reported in the multimode interferometer (MMI) coupled square ring cavity, which does not use evanescent coupling. In this work, we focused on the stabilities of the single mode behavior in coupled cavities by varying the ambient temperature and input pump powers.…”